Butterfly Valves
Bray - Resilient Seated Butterfly Valve - Series 31H
Long-Lasting Polyester-Coated Valve for Harsh Environments
Series 31H lug-style resilient seated butterfly valve is drilled and tapped to meet ASME Class 125/150 and PN16 flanges. The durable, high strength one-piece stem design utilizes an efficient internal disc to stem connection.
Series 31H valves provide a primary and secondary seal between the disc and seat, as well as the stem and seat, ensuring the total encapsulation of line media with zero external leakage.
Specification / Detail
| Size Range | NPS 2 to 20 / DN 50 to 500 |
| Body Materials | Cast Iron, Ductile Iron |
| Temperature Range | -20°F to 250°F (-29°C to 121°C) |
| Stem Materials | 416 Stainless Steel |
| Maximum Allowable Operating Pressure | 250 psi (17.2 Bar) |
| Seat Materials | Bonded EPDM, Bonded BUNA-N |
| Shutoff Rating | Bidirectional Bubble-tight |
| Disc Materials | Nylon 11 Coated Ductile Iron, Aluminum Bronze, Stainless Steel |
| Body Style | Lug |
| Testing Standard | MSS SP-61, API 598, EN 12266-1, ISO 5208 |
| Certifications | ABS, API 607, ATEX, CRN, ISO 10497, PED, PE(S)R, SIL, TR CU, TSG |
| Face to Face | MSS SP-67, API 609 Category A, EN 558 Series 20 |
| Flange Drilling | ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN16 |
| Applications | High Pressure, HVAC, Dead-End service |